| author | Mario de Sousa <msousa@fe.up.pt> |
| Wed, 01 Aug 2012 09:05:25 +0100 | |
| changeset 618 | 5e09f665c2f1 |
| parent 276 | 1679f514f38a |
| permissions | -rwxr-xr-x |
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(* Following taken directly from the IEC 61131.3 draft standard *) |
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(* |
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* An IEC 61131-3 IL and ST compiler. |
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* |
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* Based on the |
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* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) |
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* |
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*) |
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FUNCTION_BLOCK INTEGRAL |
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VAR_INPUT |
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RUN : BOOL ; (* 1 = integrate, 0 = hold *) |
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R1 : BOOL ; (* Overriding reset *) |
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XIN : REAL ; (* Input variable *) |
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X0 : REAL ; (* Initial value *) |
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CYCLE : TIME ; (* Sampling period *) |
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END_VAR |
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VAR_OUTPUT |
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Q : BOOL ; (* NOT R1 *) |
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XOUT : REAL ; (* Integrated output *) |
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END_VAR |
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Q := NOT R1 ; |
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IF R1 THEN XOUT := X0 ; |
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ELSIF RUN THEN XOUT := XOUT + XIN * TIME_TO_REAL(CYCLE); |
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END_IF ; |
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END_FUNCTION_BLOCK |
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